tarmac, the attorney called her death a tragic accident that did not any violation of our criminal laws. >>> in just a few hours a man accused of killing a federal criminal investigator is expected to be arraigned. police say randy alana, a registered sex offender was the last person seen with sandra coke before he disappeared august 4th in oakland, her body was found 5 days later in vacaville, he was her former boyfriend and claims they had rekindled their relationship and planned to marry. >>> police are investigateing a accident in san francisco involving a bus that struck and killed a bicyclist after 8:30 this morning. mike nemack has the report. >> yes, the bicycle was there and involved and the spokemans said it happened then when it collided with the bicyclist. it does not appear the bus was damaged, they say the bicyclist was a man and died at the scene, attached a garbage bag and scattered and a number of bottles, police and muni have launched separate investigations, both say the driver of the bus, a 10 year veteran with muni is cooperating. >> we are talking to the witnesses